US20130016302A1 - Light-emitting device for liquid crystal display apparatus and liquid crystal display apparatus - Google Patents
Light-emitting device for liquid crystal display apparatus and liquid crystal display apparatus Download PDFInfo
- Publication number
- US20130016302A1 US20130016302A1 US13/318,780 US201113318780A US2013016302A1 US 20130016302 A1 US20130016302 A1 US 20130016302A1 US 201113318780 A US201113318780 A US 201113318780A US 2013016302 A1 US2013016302 A1 US 2013016302A1
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- US
- United States
- Prior art keywords
- light
- bar
- heat
- liquid crystal
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0085—Means for removing heat created by the light source from the package
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133628—Illuminating devices with cooling means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
- The present invention relates to a field of liquid crystal display technology, and more particularly to a light-emitting device for liquid crystal display apparatus and a liquid crystal display apparatus.
- As liquid crystal display apparatuses are continuously applied, users have more and more requirements for functions of the liquid crystal display apparatuses.
- With reference to
FIG. 1 ,FIG. 1 is a light-emitting structure of a liquid crystal structure in accordance with the prior art. - In the light-emitting structure shown in
FIG. 1 , alight bar 11 and aframe 12 are included, wherein theframe 12 has afixing bar 121 protruded from a surface thereof, and a longer side of thelight bar 11 is fixed onto thefixing bar 121. Heat generated by light-emitting diodes 111 on thelight bar 11 is dissipated along a direction perpendicular to a light-emittingsurface 112 thereof into the air, or into a main body of thelight bar 11 and then conducted to thefixing bar 121 via the longer side of thelight bar 11 so as to achieve heat dissipation, that is to say, thelight bar 11 dissipates heat along a direction D1. - It has been found in practical measurement that a temperature variation along a length direction of the
light bar 11 and a temperature variation along the direction D1 do not have differences in order of magnitude. Therefore thelight bar 11 requires heat-dissipation in two-dimensional space along the direction D1 and the length direction of thelight bar 11. - However the light-emitting structures in the conventional technology does not have a heat-dissipation channel along the length direction of the
light bar 11, and only dissipates heat via the longer side of thelight bar 11 that attached to thefixing bar 121 of theframe 12, and thereby extremely affects the heat-dissipation effect for the light-emitting structures. - Hence, how to overcome the problem of low heat-dissipation effect of the light-emitting structures in conventional technology caused by a light bar that is unable to perform effective heat-dissipation along a length direction of the light bar, is one of the technical problems to be solved in the field of liquid crystal display technology.
- A first object of the invention is to provide a light-emitting device of a liquid crystal display apparatus to solve the technical problem of low heat-dissipation effect of a light-emitting structure in conventional technology caused by a light bar that is unable to perform effective heat-dissipation along a length direction of the light bar.
- In order to solve the foregoing problem, the present invention provides a light-emitting device having a light bar and a frame, wherein a fixing bar is protruded from a surface of a main body of the frame, and an extension direction of the fixing bar is parallel with the surface of the main body of the frame; a longer side of a main body of the light bar is attached to the fixing bar, and a length direction of the light bar is parallel with the extension direction of the fixing bar; the light bar has a plurality of light-emitting diodes, and the light-emitting diodes are arranged averagely on the main body of the light bar;
- each of two ends of the fixing bar has a heat-conductive portion mounted thereon, and an inner surface of the heat-conductive portion is perpendicular to the length direction of the main body of the light bar and attached to a shorter side of the main body of the light bar;
- the heat-conductive portion is integrally and transversely protruded from each of the two ends of the fixing bar.
- In the light-emitting device of the liquid crystal display apparatus of the present invention, the device further comprises a backboard, and the frame is mounted on the backboard.
- A second object of the invention is to provide a light-emitting device of a liquid crystal display apparatus to solve the technical problem of low heat-dissipation effect of a light-emitting structure in conventional technology caused by a light bar that is unable to perform effective heat-dissipation along a length direction of the light bar.
- In order to solve the foregoing problem, the present invention provides a light-emitting device having a light bar and a frame, wherein a fixing bar is protruded from a surface of a main body of the frame, and an extension direction of the fixing bar is parallel with the surface of the main body of the frame; a longer side of a main body of the light bar is attached to the fixing bar, and a length direction of the light bar is parallel with the extension direction of the fixing bar;
- each of two ends of the fixing bar has a heat-conductive portion mounted thereon, and an inner surface of the heat-conductive portion is perpendicular to the length direction of the main body of the light bar and attached to a shorter side of the main body of the light bar.
- In the light-emitting device of the liquid crystal display apparatus of the present invention, the device further comprises a backboard, and the frame is mounted on the backboard.
- In the light-emitting device of the liquid crystal display apparatus of the present invention, the light bar has a plurality of light-emitting diodes, and the light-emitting diodes are arranged averagely on the main body of the light bar.
- In the light-emitting device of the liquid crystal display apparatus of the present invention, the heat-conductive portion is integrally and transversely protruded from each of the two ends of the fixing bar.
- In the light-emitting device of the liquid crystal display apparatus of the present invention, the heat-conductive portion is an independent heat-conductive sheet, and the heat-conductive sheet is attached to the shorter side of the main body of the light bar and the frame by adhesion.
- A third object of the invention is to provide a liquid crystal display apparatus to solve the technical problem of low heat-dissipation effect of a light-emitting structure in conventional technology caused by a light bar that is unable to perform effective heat-dissipation along a length direction of the light bar.
- In order to solve the foregoing problem, the present invention provides a liquid crystal display apparatus having a liquid crystal panel and a light-emitting device, and the light-emitting device is mounted on a side of the liquid crystal panel and includes a light bar and a frame, wherein a fixing bar is protruded from a surface of a main body of the frame, and an extension direction of the fixing bar is parallel with the surface of the main body of the frame; a longer side of a main body of the light bar is attached to the fixing bar, and a length direction of the light bar is parallel with the extension direction of the fixing bar;
- each of two ends of the fixing bar has a heat-conductive portion mounted thereon, and an inner surface of the heat-conductive portion is perpendicular to the length direction of the main body of the light bar and attached to a shorter side of the main body of the light bar.
- In the liquid crystal display apparatus of the present invention, the light-emitting device further comprises a backboard, and the frame is mounted on the backboard.
- In the liquid crystal display apparatus of the present invention, the light bar has a plurality of light-emitting diodes, and the light-emitting diodes are arranged averagely on the main body of the light bar.
- In the liquid crystal display apparatus of the present invention, the heat-conductive portion is integrally and transversely protruded from each of the two ends of the fixing bar.
- In the liquid crystal display apparatus of the present invention, the heat-conductive portion is an independent heat-conductive sheet, and the heat-conductive sheet is attached to the shorter side of the main body of the light bar and the frame by adhesion.
- Compared with the conventional technology, the present invention solves the problem of low heat-dissipation effect of a light-emitting structure in conventional technology caused by a light bar that is unable to perform effective heat-dissipation along a length direction of the light bar, and accomplishes the heat-dissipation of the light bar in two-dimensional space.
- In order to make the contents of the present invention to be easily understood, the preferred embodiments of the present invention are described in detail in cooperation with accompanying drawings as follows:
-
FIG. 1 is a light-emitting structure of a liquid crystal device in accordance with the prior art; -
FIG. 2 is a schematic structural view of a first preferred embodiment of a light-emitting structure of a liquid crystal display apparatus in accordance with the present invention; and -
FIG. 3 is a schematic structural view of a second preferred embodiment of a light-emitting structure of a liquid crystal display apparatus in accordance with the present invention. - Following description of each embodiment is referring to the accompanying drawings so as to illustrate practicable specific embodiments in accordance with the present invention.
- With reference to
FIG. 2 ,FIG. 2 is a schematic structural view of a first preferred embodiment of a light-emitting structure of a liquid crystal display apparatus in accordance with the present invention. - In the light-emitting device of the liquid crystal display apparatus shown in
FIG. 2 , the device comprises alight bar 21 and aframe 22. Afixing bar 221 is protruded from a surface of a main body of theframe 22, Thefixing bar 221 extends along an extension direction M1. The extension direction M1 is parallel with the surface of the main body of theframe 22. A longer side of a main body of thelight bar 21 is attached to thefixing bar 221. A length direction of the main body of thelight bar 21 is parallel with the extension direction of thefixing bar 221. - In the embodiment shown in
FIG. 2 , each of two ends of thefixing bar 221 has a heat-conductive portion 2211 mounted thereon. An inner surface of the heat-conductive portion 2211 is attached to ashorter side 211 of the main body of thelight bar 221. Meanwhile, the heat-conductive portion 2211 is perpendicular to the length direction of the main body of thelight bar 21. - In the embodiment shown in
FIG. 2 , the heat-conductive portion 2211 is integrally and transversely protruded from each of the two ends of thefixing bar 221. - In the embodiment shown in
FIG. 2 , thelight bar 21 has a plurality of light-emitting diodes 212, and the light-emitting diodes 212 are averagely arranged on the main body of thelight bar 21. Thelight bar 21 further has a light-emittingsurface 213. - In this embodiment, the device further has a backboard (not shown in the drawings), the
frame 22 is mounted on the backboard. - The operation theory of the light-emitting device of the liquid crystal display apparatus shown in
FIG. 2 is described as follows: - The light-
emitting diodes 212 generates heat during work, a part of the heat is dissipated into the air along a direction perpendicular to the light-emittingsurface 213; another part is guided into the main body of thelight bar 21 and then transferred to thefixing bar 221 via the longer side of thelight bar 21 and then further transferred to theframe 21 to perform dissipation, that is to say, a part of the heat of the light-emittingdiodes 212 is dissipated along a direction M2; still another part of the heat is transferred to the heat-conductive portion 2211 of thefixing bar 221 via theshorter side 211 along the length direction of thelight bar 21, and further transferred to theframe 21, and theframe 21 then transfers the heat to the backboard to perform heat-dissipation, that is to say, another part of the heat of the light-emittingdiodes 212 is dissipated along the direction M1. - Apparently, this embodiment is able to not only use a path perpendicular to the light-emitting
surface 213 as a heat-dissipation channel to dissipate heat, but also dissipates heat along the length direction of thelight bar 21, and thereby accomplishes heat-dissipation in two-dimensional space, and greatly ensures the heat-dissipation effect. - The present invention further provides a liquid crystal display apparatus. The liquid crystal display apparatus includes a liquid crystal panel and a light-emitting device shown in
FIG. 2 . The light-emitting device is mounted at a side of the liquid crystal panel. The device has been described in detail in the foregoing description, and no more tautology here. - With reference to
FIG. 3 ,FIG. 3 is a schematic structural view of a second preferred embodiment of a light-emitting structure of a liquid crystal display apparatus in accordance with the present invention. - In the embodiment shown in
FIG. 3 , the difference to the embodiment shown inFIG. 2 is that:shorter sides 211 of thelight bar 21 are respectively connected to a heat-conductive sheet 31. Wherein, the shorter sides of thelight bar 21 are two ends of thelight bar 21 along the length direction of thelight bar 21. The heat-conductive portion is an independent heat-conductive sheet 31, and the heat-conductive sheet 31 is attached to the shorter side of the main body of thelight bar 21 and theframe 22 by adhesion. - The heat-
conductive sheet 31 may also be connected to theshorter side 211 of thelight bar 21 and theframe 22 using other methods, such as soldering. - In this embodiment, the device further has a backboard (not shown in the drawings), the
frame 22 is mounted on the backboard. - In the embodiment shown in
FIG. 3 , thelight bar 21 has a plurality of light-emittingdiodes 212, and the light-emittingdiodes 212 are averagely arranged on the main body of thelight bar 21. Thelight bar 21 further has a light-emittingsurface 213. - The operation theory of the light-emitting device of the liquid crystal display apparatus shown in
FIG. 3 is described as follows: - The light-emitting
diodes 212 generates heat during work, a part of the heat is dissipated into the air along a direction perpendicular to the light-emittingsurface 213; another part is guided into the main body of thelight bar 21 and then transferred to the fixingbar 221 via the longer side of thelight bar 21 and then further transferred to theframe 21 to perform dissipation, that is to say, a part of the heat of the light-emittingdiodes 212 is dissipated along a direction M2; still another part of the heat is transferred to the heat-conductive sheet 31 via theshorter side 211 along the length direction of thelight bar 21, the heat is further transferred to theframe 21 via the heat-conductive sheet 31, and theframe 21 then transfers the heat to the backboard to perform heat-dissipation. - Apparently, the embodiment shown in
FIG. 3 can not only ensure thelight bar 21 use a path perpendicular to the light-emittingsurface 213 as a heat-dissipation channel to perform heat-dissipation, but also performs heat-dissipation along the length direction of thelight bar 21, and thereby accomplishes heat-dissipation in two-dimensional space, and greatly ensures the heat-dissipation effect. - The present invention further provides a liquid crystal display apparatus. The liquid crystal display apparatus includes a liquid crystal panel and a light-emitting device shown in
FIG. 3 . The light-emitting device is mounted at a side of the liquid crystal panel. The device has been described in detail in the foregoing description, and no more tautology here. - In conclusion, although the present invention has been described with reference to embodiments thereof, these embodiments merely illustrate concrete examples, not restrict the present invention. And it is understood that many changes and modifications to the described embodiment can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
Claims (12)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201120242814.8 | 2011-07-11 | ||
CN201120242814U | 2011-07-11 | ||
CN2011202428148U CN202302991U (en) | 2011-07-11 | 2011-07-11 | Light-emitting device of LCD (liquid crystal display) and LCD |
PCT/CN2011/078315 WO2013007055A1 (en) | 2011-07-11 | 2011-08-12 | Light-emitting device of liquid crystal display and liquid crystal display |
Publications (2)
Publication Number | Publication Date |
---|---|
US20130016302A1 true US20130016302A1 (en) | 2013-01-17 |
US8854570B2 US8854570B2 (en) | 2014-10-07 |
Family
ID=46371880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/318,780 Active 2032-04-16 US8854570B2 (en) | 2011-07-11 | 2011-08-12 | Light-emitting device for liquid crystal display apparatus and liquid crystal display apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US8854570B2 (en) |
CN (1) | CN202302991U (en) |
WO (1) | WO2013007055A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102889564B (en) * | 2012-10-09 | 2015-05-06 | 深圳市华星光电技术有限公司 | Backboard and backlight module and liquid crystal display device using backboard |
WO2014141882A1 (en) * | 2013-03-11 | 2014-09-18 | シャープ株式会社 | Display apparatus and television receiving apparatus |
TWI561898B (en) * | 2014-01-28 | 2016-12-11 | Radiant Opto Electronics Corp | Light source module and lamp |
US10397060B2 (en) | 2017-03-02 | 2019-08-27 | Cisco Technology, Inc. | Identity-based policy implementation in network address translation (NAT) environments |
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2011
- 2011-07-11 CN CN2011202428148U patent/CN202302991U/en not_active Expired - Lifetime
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- 2011-08-12 WO PCT/CN2011/078315 patent/WO2013007055A1/en active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
CN202302991U (en) | 2012-07-04 |
WO2013007055A1 (en) | 2013-01-17 |
US8854570B2 (en) | 2014-10-07 |
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